A Jedi Master from the time of the Sith Wars, very little is known about her.  Another name that is used to refer to her is the Handmaiden.  An extremely highly trained Jedi, one record credits her as the eventual killer of Darth Nihilus aboard his flagship of the Sith fleet, which has put down most resistance throughout the galaxy.  With the leader dead, it is assumed that the remaining Sith fight among each other and the Republic comes back again, to last until the Empire under Darth Sidious rules the galaxy.